This is all just hearsay, but it would be interesting if it turns out to be true [1]:

Mitt Romney last week told a private group of potential supporters and business and media elites, including Rupert Murdoch, that he was treading carefully around the issue of immigration to avoid looking like a "flip-flopper."

...But one of the most notable exchanges was on immigration, when [Univision CEO Randy Falco] began by telling Romney how frequently President Obama has been on Univision in comparison to the Republican candidate, and added that he thinks it's important for the GOP hopeful to address what the president did on immigration a few weeks ago with his executive action move to halt some deportations.

Murdoch chimed in, three sources said, telling the candidate, "You have to take the fight to Obama on this." Romney said the Hispanic vote is important, noting he has Sen. Marco Rubio on the trail for him and that one of his own sons speaks Spanish, but indicated he is not going to change positions from some of what he said in the primaries.

"I know I took some positions in the primary that are" hard to contend with in a general, Romney said, according to two sources.

"I am not going to be a flip-flopper," he added, according to one guest. He talked more about the various concerns that he has to balance in terms of competing constituencies who have different views - and noted, two sources said, the precise percentage that Hispanic voters make up in the swing states, a figure that was less than 20 percent.

Those at the billionaires' (or at least millionaires') meeting were supposedly: